Method of retransmission to reduce the overhead

Abstract

A method of transmitting data in a wireless access system and a packet retransmitting method therein are disclosed. The present invention includes receiving an initial control message including information required for a packet retransmission from a base station, transmitting the packet to be provided with a service from the base station, and if a NACK (non-acknowledgement) signal is received from the base station, retransmitting the packet corresponding to the NACK signal to the base station using the information required for the packet retransmission and included in the initial control message. Therefore, since a separate control message needs not to be transmitted in case of packet retransmission,.it is able to save radio resources and reduce an overhead by retransmitting a packet via a previously allocated retransmission region without the separate control message.

Description

TECHNICAL FIELD[0001]The present invention relates to a method of transmitting data in a wireless access system, and more particularly, to various packet retransmission methods in the data transmitting method.BACKGROUND ART[0002]In the following description, explained is a method of transmitting packets in terminals that use IP based voice over internet protocol (hereinafter abbreviated ‘VoIP’) in a broadband wireless access system. For this, VoIP traffic is described as follows. Yet, a packet transmitting method according to the present invention needs not to be limited to the VoIP packet transmission described in the following.[0003]First of all, VoIP traffic is characterized in being generated in a fixed size with a fixed period in VoIP codec. And, VoIP communication can be divided into a talk period (talk-spurt), for which inter-user call is in progress, and a silence period for which a user is not talking but listening. In general, the silence period occupies over 50% in a whol...

AI Technical Summary

Benefits of technology

The present invention relates to a method of transmitting data in a wireless access system, and more particularly to a method of transmitting Voice over IP (VoIP) packets in a fixed size with a fixed period in VoIP codec. The invention addresses the issue of resource waste in VoIP traffic by introducing a silence suppression scheme and utilizing the ARQ (automatic repeat request) scheme for data retransmission. The invention also discusses the allocation of regions for VoIP packet transmission and the use of the SAW, GBN, and SR ARQ schemes for data transmission and retransmission. The technical effects of the invention include improved efficiency in resource allocation and reduced waste of network resources in VoIP traffic.

Problems solved by technology

Since voice data is not generated for the silence period, if a bandwidth is allocated to the silence period, it may bring about a resource waste.

Since the SR ARQ scheme gives a sequence to each frame and manages it, the implementation of the SR ARQ scheme may becomes complicated relatively.

Although this scheme enables decoding more accurate than the second type HARQ scheme, it has efficiency poorer than that of the second type HARQ scheme in aspect of coding gain.

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